The USA is advising people to wear face masks. This could slow down the spread of COVID-19. The WHO said people who are not sick do not need masks. Other organisations say people in countries like Singapore and South Korea wear masks. In these countries, infection rates are lower.

Many experts say nurses and doctors need the masks. They say masks could make people feel safe so they mix with other people. Other experts worry that homemade masks will not stop the virus. The White House said: "The most important thing is the social distancing, washing your hands and not touching your face."